File extension EML is most commonly associated with an Outlook Express Electronic Mail (E-Mail) file. EML files are plaintext files used for storing an E-Mail message

File Extension CRDOWNLOAD is used by Google Chrome to temporarily store downloaded file information when file is being downloaded. Usually information in CRDOWNLOAD file is incomplete until file is downloaded.

JAR files are used to store java application libraries. JAR files are derived from ZIP files and use same compression mechanism. JAR files include a Java-specific manifest file

DAT file extension could represent following file types:

- Data file

- A data file extension used to designate an error message in a inbound internet email message (Microsoft Exchange Server v 5.0)

- WordPerfect Merge Data

- Extension used for some MPEG files

- Yahoo Messenger archive file

PPS format is a PowerPoint Slideshow format. If you do not have PowerPoint, Microsoft has a free PowerPoint viewer. Use their download site to search for it. Another option is to use the free OpenOffice.org office suite. The presentation portion of the suite can both display and edit PowerPoint presentations.

A file with the extension .dmg (an abbreviation for disk image) uses a disk image format commonly found on Mac OS X. The format allows secure password protection as well as file compression and hence serves both security and file distribution functions.

QFX file extension is a open financial exchange file generated by Quicken. It is used to store financial information. QFX files are based on XML format and usually contain financial transactions for certain accounts.

File extension TIMESTAMP is used by various applications to store time and date information. Timestamp is a number which is calculated based on a specific time and date when file was created or modified. Timestamp information is used to check when file was created and updated

Files with extension DWG are usually used to store two and thre dimensional data used in engineering. Typical examples of software which use this format is Autocad, IntelliCAD, Caddie and Open Design Alliance applications. DWG is short for drawing. The .bak (drawing backup), .dws (drawing standards), .dwt (drawing template) and .sv$ (temporary automatic save) files are also DWG files.

APK extension is used to deliver and install application software and middleware onto Google Android system. APK file contains compiled Android application code and all resources which are required by this code.